Equal division detector for ball way of inner ring of transmission shaft

Abstract

A clamping device, an orienting device, a contact device and a measuring device are installed on a working table plate, the lower portion of a pull rod of the clamping device is in spiral connection with an expansion sleeve, the outer conical surface of the pull rod is in sliding connection with the inner conical surface of the expansion sleeve, and the front end of a guide rod A of the orienting device is fixedly connected with a steel ball A; a steel ball A is in contact positioning with a ball groove under the action of a spring A. A bolt C of the contact device penetrates through a support B to be fixedly connected with an upper limiting plate, a bolt D penetrates through the support B to be fixedly connected with a lower limiting plate, a steel ball B is located between the upper limiting plate and the lower limiting plate which are opposite to each other, and the steel ball B is in contact with the adjacent ball groove. The measuring device comprises a swing part, a cylindrical ring and a dial indicator. The swing piece is in tangent contact with the steel ball B. A dial indicator is installed on the support D, and a measuring head on the dial indicator is opposite to the swing piece. By using the technology, when the inner ring ball way equal division is measured, the adjustment is convenient, the efficiency is high, and the detection precision of the inner ring ball way equal division can be ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to the measuring instrument of ball track equal division, concretely is transmission shaft inner ring ball track equal division detector. BACKGROUND

[0002] The constant velocity universal joint transmission shaft of a car is composed of a fixed end joint, an intermediate shaft and a moving end joint, wherein the fixed end joint is directly connected with the hub of the car wheel, and the moving end joint is directly connected with the differential of the engine, the power of the engine is transmitted to the wheel through the differential, the moving end joint, the intermediate shaft, the fixed end joint and the hub, so as to drive the wheel to rotate. The fixed end joint is mainly composed of an outer ring, a retainer, a steel ball and an inner ring; the moving end joint is mainly composed of a sleeve, a retainer, a steel ball and an inner sleeve, the ball track of the inner ring is matched with the ball track of the outer ring through the steel ball, the ball track of the inner ring is completed by hard milling or grinding finishing, and the precision requirement is high. If the equal division precision of the ball track of the inner ring is unqualified, the matching of the ball track of the inner ring and the ball track of the outer ring through the steel ball does not meet the technical specification requirement, is easy to wear, shortens the service life of the inner ring, is stuck and causes abnormal noise. In the past, three-coordinate measurement is adopted for the equal division of the ball track of the inner ring, but the measurement rhythm is long, the efficiency is low, the production needs to be stopped to wait for the measurement result of the three-coordinate, three-coordinate resources are occupied, and a large amount of resources are wasted; at the same time, a considerable part of enterprises think that the equal division of the ball track of the inner ring is guaranteed by program processing, actually, with the change of equipment precision, the wear and adjustment error of the clamp, the wear of the cutting tool and other conditions, the equal division of the ball track of the inner ring exists out-of-tolerance, and is a potential defect difficult to find. The out-of-tolerance of the equal division of the ball track will directly cause the assembly of the fixed end joint to be stuck and abnormal noise, and the production needs to be stopped to wait for the solution of the problem, and a considerable part of enterprises have such experience. Therefore, an instrument for efficiently and conveniently measuring the equal division of the ball track of the inner ring and guaranteeing the measurement precision is urgently needed in the machining site. SUMMARY

[0003] The utility model aims at providing a transmission shaft inner ring ball track equal division detector, using the technology, when measuring the equal division of the ball track of the inner ring, not only convenient adjustment, high efficiency, and can guarantee the detection precision of the equal division of the ball track of the inner ring.

[0004] The utility model discloses a technical scheme is: transmission shaft inner ring ball channel equal division detector, including support, workbench board, workbench board and support fixed connection, be equipped with cylindrical guide hole on workbench board, workbench board is equipped with clamping device, directional device, contact device, measuring device, the clamping device, including expansion sleeve, pull rod, bolt A, supporting block, bolt B, expansion sleeve and the cylindrical guide hole on workbench board sliding connection are equipped with positioning boss on expansion sleeve, be equipped with inner taper surface in expansion sleeve, expansion sleeve lower part is equipped with screw hole, the pull rod is installed in expansion sleeve, and pull rod lower part is equipped with threaded rod portion A, and the threaded rod portion A of pull rod is helical connection with the screw hole of expansion sleeve, be equipped with outer taper surface on pull rod, and outer taper surface is sliding connection with the inner taper surface, bolt A passes through workbench board and is fixedly connected with the supporting block installed in the cylindrical guide hole, and the supporting block is contacted with expansion sleeve, plays the role of adjusting the high position of expansion sleeve, bolt B passes through workbench board and is screwed with expansion sleeve, is used for expansion sleeve and supporting block close positioning, the directional device, including support A, guide rod A, nut A, steel ball A, spring A, support A and workbench board fixed connection, be equipped with hole A on support A, guide rod A and hole A sliding connection are equipped with cylindrical boss A on guide rod A, and guide rod A tail end is equipped with threaded rod portion B, nut A is helical connection with threaded rod portion B, guide rod A front end is fixedly connected with steel ball A, spring A is sleeved on guide rod A and is located between cylindrical boss A and support A, contact device includes support B, bolt C, upper limit board, pin B, bolt D, lower limit board, pin A, steel ball B, guide rod B, nut B, spring B, support B and workbench board fixed connection, bolt C passes through support B and is fixedly connected with upper limit board, pin B and support B and upper limit board fixed connection, bolt D passes through support B and is fixedly connected with lower limit board, pin A and support B and lower limit board fixed connection, upper limit board and lower limit board have same structure, lower limit board has lower bottom and lower limit inclined surface, upper limit board has upper bottom and upper limit inclined surface, steel ball B is located between two opposite upper limit board and lower limit board, and can slide between upper limit board and lower limit board, the effect of upper limit inclined surface and lower limit inclined surface is preventing steel ball B from falling, guide rod B is supported by support B, and hole B is equipped on support B, and guide rod B and hole B sliding connection are equipped with cylindrical boss B on guide rod B, and cylindrical boss B is opposite to steel ball B, steel ball A and steel ball B are in the same horizontal plane, and guide rod B tail end is equipped with threaded rod portion C, nut B is helical connection with threaded rod portion C, spring B is sleeved on guide rod B and is located between cylindrical boss B and support B.The measuring device, including support C, support D, pivot, swing piece, cylindrical ring, support block, bolt E, nut C, spring C, dial gauge, screw, support C and support D are respectively fixedly connected with workbench plate, the pivot is fixedly connected on support C, the swing piece is provided with cylindrical ring, swing piece is rotatably connected on pivot through cylindrical ring, swing piece is provided with through slot, support C is fixedly connected with support block, bolt E passes through the through slot on swing piece, is fixedly connected with support block through the screw connection with nut C, spring C is sleeved on bolt E and is located between support block and swing piece, the action is that the elastic force makes swing piece and steel ball B tangent contact, support D is provided with dial gauge, the dial gauge pointer is fastened on support D (23) by screw, dial gauge is provided with measuring head, and measuring head is opposite to swing piece.

[0005] The principle of the utility model is: specific is first with three coordinate measurement selected inner ring ball track equal division value meets the limit sample requirement of inner ring, and measures the center of inner ring ball track, as inner ring limit sample, records the measurement value and follows the inner ring limit sample. The inner ring limit sample is that the difference between the maximum value and the minimum value of the ball track equal division of the inner ring is same with the difference between the upper limit value and the lower limit value of the design requirement. The height of the expansion sleeve is adjusted through bolt A and bolt B, so that the ball track center of the inner ring limit sample and the steel ball A and the steel ball B are on the same horizontal plane: the distance from the ball track center value of the limit sample to the workbench plate + the distance from the positioning boss to the workbench plate = the distance from the center of the steel ball B to the workbench plate. The inner hole of the inner ring limit sample is sleeved on the expansion sleeve, so that the reference surface of the inner ring limit sample is close to the positioning boss, the steel ball A is in contact with the ball track of the inner ring limit sample under the elastic force of the spring A, so that the inner ring limit sample is circumferentially positioned, the inner ring is expanded through the rotation of the inner hexagonal nest pull rod, the steel ball B is in contact with the adjacent ball track of the inner ring limit sample under the elastic force of the spring B, the movement of the steel ball B between the upper limiting plate and the lower limiting plate is free, the contact between the steel ball B and the ball track of the inner ring limit sample is fully sufficient, the steel ball B is in contact with the swing piece, the swing piece has a certain rotation around the pivot, the dial gauge pointer produces a certain movement, the reading of the dial gauge pointer shows a certain value, the pull rod is loosened, the inner ring limit sample is removed, another ball track is replaced, the pull rod is tightened again, and measurement is carried out, until all the ball tracks are measured once, the difference range (the difference between the maximum value and the minimum value) of the dial gauge pointer is recorded, the inner ring to be measured is replaced, and all the ball tracks of the inner ring are measured according to the above method, if the reading difference of the dial gauge is within the difference range of the limit sample (within the design requirement range), the inner ring ball track equal division is qualified, otherwise, it is unqualified and needs to be adjusted.

[0006] The utility model has the advantages that: the inner ring ball track equal division value can be measured quickly and accurately, the efficiency is high, the measurement result is reliable, the waste rate is reduced, and the three coordinates are liberated; the utility model eliminates potential invisible quality problems and avoids the occurrence of phenomena such as production stoppage and waiting for problem solving. Attached Figure Description

[0007] Figure 1 This is a schematic diagram of the structure of the transmission shaft inner ring and circumference equal division detector of this utility model.

[0008] Figure 2 yes Figure 1 Top view.

[0009] Figure 3 yes Figure 2 A schematic diagram of the AA-direction cross section.

[0010] Figure 4 yes Figure 3 Top view of the lower limit plate.

[0011] Figure 5 yes Figure 2 View B in the diagram.

[0012] Figure 6 yes Figure 5 Top view of the swinging component.

[0013] Figure 7 yes Figure 5 A schematic diagram of the transfer shaft.

[0014] Figure 8 This is a schematic diagram of the inner ring structure.

[0015] Figure 9 yes Figure 8 A cross-sectional view along the CC direction.

[0016] Figure 10 yes Figure 8 A magnified view of the contact between the Nakane Global Road and the steel ball.

[0017] Figure 11 This is a diagram showing the usage status of the drive shaft inner ring and circumference equal division detector of this utility model.

[0018] In the figure: 1 support, 2 workbench plate, 3 positioning boss, 4 expansion sleeve, 5 inner conical surface, 6 inner hexagonal socket, 7 pull rod, 8 outer conical surface, 9 threaded rod portion A, 10 supporting block, 11 bolt A, 12 bolt B, 13 cylindrical guide hole, 14 steel ball B, 15 upper limiting plate, 16 support B, 17 threaded rod portion C, 18 bolt C, 19 rotating shaft, 20 swing piece, 21 measuring head, 22 table rod, 23 support D, 24 screw, 25 hole C, 26 micrometer, 27 support C, 28 nut C, 29 supporting block, 30 spring C, 31 bolt E, 32 three-equal-part groove, 33 steel ball A, 34 guide rod A, 35 cylindrical boss A, 36 spring A, 37 hole A, 38 support A, 39 nut A, 40 threaded rod portion B, 41 lower bottom surface, 42 cylindrical boss B, 43 guide rod B, 44 lower limiting plate, 45 bolt D, 46 hole B, 47 nut B, 48 spring B, 49 pin B, 50 upper bottom surface, 51 upper limiting inclined surface, 52 lower limiting inclined surface, 53 pin A, 54 through groove, 55 cylindrical ring, 56 ball track, 57 ball track ball center, 58 inner hole, 59 cylindrical counterbore, 60 reference surface, 61 contact point, 62 top gap. DETAILED DESCRIPTION

[0019] The utility model discloses a car constant velocity joint transmission shaft inner ring ball track equal division detector, the following is combined with the drawings of the utility model Figures 1-10The utility model discloses a transmission shaft inner ring ball channel equal-division detector, including support 1, workbench plate 2, be equipped with clamping device, orientation device, contact device, measuring device on workbench plate 2, workbench plate 2 is solid connected with support 1, be equipped with cylindrical guide hole 13 on workbench plate 2, the clamping device includes expansion sleeve 4, pull rod 7, bolt A11, to block 10, bolt B12, expansion sleeve 4 is slidably connected with the cylindrical guide hole 13 on workbench plate 2, be equipped with positioning boss 3 on expansion sleeve 4, be equipped with inner taper surface 5 in expansion sleeve 4, expansion sleeve 4 lower part is equipped with screw hole, pull rod 7 is contained in expansion sleeve 4, pull rod 7 lower part is equipped with threaded rod portion A9, and the threaded rod portion A9 of pull rod 7 is screw connected with the screw hole of expansion sleeve 4, be equipped with outer taper surface 8 on pull rod 7, inner taper surface 5 and outer taper surface 8 are slidably connected, bolt A11 passes through workbench plate 2 and is solid connected with to block 10 in cylindrical guide hole 13, and to block 10 contacts expansion sleeve 4, plays the role of adjusting the height position of expansion sleeve 4, bolt B12 passes through the hole in the bottom of workbench plate 2 and is screw connected with expansion sleeve 4, is positioned for expansion sleeve 4 and to block 10 close, the orientation device includes support A38, guide rod A34, nut A39, steel ball A33, spring A36, support A38 is solid connected with workbench plate 2, be equipped with hole A37 on support A38, guide rod A34 is slidably connected with hole A37, be equipped with cylindrical boss A35 on guide rod A34, guide rod A34 tail end is equipped with threaded rod portion B40, nut A39 is screw connected with threaded rod portion B40, guide rod A34 front end is solid connected with steel ball A33, spring A36 is sleeved on guide rod A34 and is located between cylindrical boss A35 and support A38,The contact device comprises a support B16, a bolt C18, an upper limiting plate 15, a pin B49, a bolt D45, a lower limiting plate 44, a pin A53, a steel ball B14, a guide rod B43, a nut B47, a spring B48, the support B16 is fixedly connected with the workbench plate 2, the bolt C18 penetrates through the support B16 and is fixedly connected with the upper limiting plate 15, the pin B49 is fixedly connected with the support B16 and the upper limiting plate 15, the bolt D45 penetrates through the support B16 and is fixedly connected with the lower limiting plate 44, the pin A53 is fixedly connected with the support B16 and the lower limiting plate 44, the upper limiting plate 15 and the lower limiting plate 44 have the same structure, the lower limiting plate 44 has a lower bottom surface 41 and a lower limiting inclined surface 52, the upper limiting plate 15 has an upper bottom surface 50 and an upper limiting inclined surface 51, the steel ball B14 is located between two opposite upper limiting plates 15 and lower limiting plates 44 and can slide between the upper and lower limiting plates, the upper limiting inclined surface 51 and the lower limiting inclined surface 52 prevent the steel ball B14 from falling off, the guide rod B43 is supported by the support B16, the support B16 is provided with a hole B46, the guide rod B43 is in sliding connection with the hole B46, the guide rod B43 is provided with a cylindrical boss B42 opposite to the steel ball B14, the steel ball A33 and the steel ball B14 are in the same horizontal plane, the tail end of the guide rod B43 is provided with a threaded rod part C17, the nut B47 is in screw connection with the threaded rod part C17, the spring B48 is sleeved on the guide rod B43 and located between the cylindrical boss B42 and the support B16; the measuring device comprises a support C27, a support D23, a rotating shaft 19, a swing piece 20, a cylindrical ring 55, a supporting block 29, a bolt E31, a nut C28, a spring C30, a dial gauge 26 and a screw 24, the supports C27 and D23 are fixedly connected with the workbench plate 2 respectively, the rotating shaft 19 is fixedly connected with the support C27, the swing piece 20 is provided with the cylindrical ring 55, the swing piece 20 is in rotary connection with the rotating shaft 19 through the cylindrical ring 55, the swing piece 20 is provided with a through slot 54, the support C27 is fixedly connected with the supporting block 29, the bolt E31 penetrates through the through slot 54 on the swing piece 20 and the supporting block 29 and is in screw connection with the nut C28, the spring C30 is sleeved on the bolt E31 and located between the supporting block 29 and the swing piece 20, and the spring C30 has an elastic force to make the swing piece 20 tangentially contact with the steel ball B14, the dial gauge 26 is arranged on the support D23, the dial gauge is provided with a pointer 22 located in a hole C25 on the support D, a screw 24 on the hole C25 is in screw connection with the support D23 and fixes the pointer 22 and the support D23, the dial gauge 26 is provided with a measuring head 21 opposite to the swing piece 20.

[0020] The inner ring typically has six or eight lanes 56, which are composed of arcs or straight lines plus arcs. The inner ring has an inner hole 58 and a reference surface 60. The end of the inner hole 58 has a cylindrical enlarged hole 59, with one side of the reference surface 60. The cross-section of the inner ring lanes 56 is elliptical. When the steel ball A33 or steel ball B14 contacts the inner ring lanes 56, there are two contact points 61 with the ellipse. There is a gap between the steel ball and the ellipse of the inner ring lanes 56, usually called the top gap 62. The purpose of the elliptical cross-section of the inner ring lanes 56 is twofold: first, the two contact points 61 between the steel ball and the elliptical inner ring lanes 56 make the process more stable and wear-resistant; second, the top gap 62 between the steel ball and the elliptical inner ring lanes 56 allows grease to enter, resulting in more thorough lubrication and wear resistance.

[0021] The working process of this utility model is as follows: First, mark the inner ring whose course division values ​​meet the requirements of the limit sample after selection by coordinate measuring machine, and measure the center of the inner ring course as the inner ring limit sample. Record the measured values ​​and follow the inner ring limit sample. Adjust the height of the expansion sleeve 4 by bolts A11 and B12 so that the center of the inner ring limit sample's course is on the same horizontal plane as steel balls A33 and B14 (the center value of the course of the limit sample + the distance from the positioning boss 3 to the worktable 2 = the distance from the center of steel ball B14 to the worktable). (Distance between plates), the inner hole 58 of the inner ring limit sample is fitted onto the expansion sleeve 4, so that the reference surface 60 of the inner ring limit sample is close to the positioning boss 3. Under the elastic force of the spring A36, the steel ball A33 contacts and closes to the ball track of the inner ring limit sample, so that the inner ring limit sample is circumferentially positioned. The inner ring is tightened by rotating the pull rod 7 through the inner hexagonal recess 6. Under the elastic force of the spring B48, the cylindrical boss B42 pushes the steel ball B14 to contact and close to the adjacent ball track of the inner ring limit sample. Since the steel ball B14 is on the upper bottom of the upper limiting plate 15 The surface 50 and the lower bottom surface 41 of the lower limiting plate 44 are sliding, meaning that the steel ball B14 is free when it contacts the inner ring track in the horizontal plane. The contact between the steel ball B14 and the inner ring limit sample track is complete and sufficient. When the steel ball B14 contacts the swing member 20, the swing member 20 rotates a certain amount around the axis 19. As a result, the probe 21 of the dial indicator 26, which is in contact with the swing member 20, moves a certain amount. The pointer reading of the dial indicator 26 shows a certain value. This value is recorded. The pull rod 7 is released, the inner ring limit sample is removed, and replaced with the inner ring limit sample. Position the inner ring circumferentially on the adjacent fairway of the limit sample, then rotate the pull rod 7 to tighten the inner ring and perform measurements. Repeat this process for all inner ring limit samples, recording the variation range (difference between maximum and minimum values) of the dial indicator 26 pointer during the measurement of each fairway 56. Following the same method, replace the inner ring to be measured and measure all fairways 56 of the inner ring. If the variation in the dial indicator 26 reading is within the variation range of the limit sample (within the design requirements), the inner ring fairway division is qualified; otherwise, it is unqualified and requires adjustment. The limit sample is defined as the inner ring fairway division where the difference between the maximum and minimum values ​​is the same as the difference between the upper and lower limits of the design requirements.

Claims

1. A tester for equally dividing the inner ring and circumference of a drive shaft, characterized in that: The system includes a support column (1) and a worktable (2). The worktable (2) is fixedly connected to the support column (1). The worktable (2) has a cylindrical guide hole (13). The worktable (2) is equipped with a clamping device, a directional device, a contact device, and a measuring device. The clamping device includes a tension sleeve (4), a pull rod (7), a bolt A (11), a support block (10), and a bolt B (12). The tension sleeve (4) is slidably connected to the cylindrical guide hole (13) on the worktable (2). The tension sleeve (4) has a positioning boss (3), an inner conical surface (5) inside the tension sleeve (4), and a threaded hole at the bottom of the tension sleeve (4). The pull rod (7) is installed inside the expansion sleeve (4). The lower part of the pull rod (7) is provided with a threaded rod A (9). The threaded rod A (9) of the pull rod (7) is screwed to the threaded hole of the expansion sleeve (4). The pull rod (7) is provided with an outer conical surface (8). The inner conical surface (5) is slidably connected to the outer conical surface (8). The bolt A (11) passes through the workbench plate (2) and is fixedly connected to the support block (10) installed in the cylindrical guide hole (13). The support block (10) is in contact with the expansion sleeve (4). The bolt B (12) passes through the workbench plate (2) and is threadedly connected to the expansion sleeve (4). The orientation device includes a bracket A (38), a guide rod A (34), a nut A (39), a steel ball A (33), and a spring A (36). The bracket A (38) is fixedly connected to the workbench plate (2). The bracket A (38) is provided with a hole A (37). The guide rod A (34) is slidably connected to the hole A (37). The guide rod A (34) is provided with a cylindrical boss A (35). The tail end of the guide rod A (34) is provided with a threaded rod part B (40). The nut A (39) is screwed to the threaded rod part B (40). The front end of the guide rod A (34) is fixedly connected to the steel ball A (33). The spring A (36) is fitted on the guide rod A (34) and located between the cylindrical boss A (35) and the bracket A (38).The contact device includes a bracket B (16), a bolt C (18), an upper limiting plate (15), a pin B (49), a bolt D (45), a lower limiting plate (44), a pin A (53), a steel ball B (14), a guide rod B (43), a nut B (47), and a spring B (48). The bracket B (16) is fixedly connected to the worktable plate (2). The bolt C (18) passes through the bracket B (16) and is fixedly connected to the upper limiting plate (15). The pin B (49) is fixedly connected to both the bracket B (16) and the upper limiting plate (15). The bolt D (45) passes through the bracket B (16) and is fixedly connected to the lower limiting plate (44). The pin A (53) is fixedly connected to the bracket B (16) and the lower limiting plate (44). The upper limiting plate (15) and the lower limiting plate (44) have the same structure. The lower limiting plate (44) has a lower bottom surface (41) and a lower limiting slope (52). The upper limiting plate (15) has an upper bottom surface (50) and an upper limiting slope (51). The steel ball B (14) is located between the upper limiting plate (15) and the lower limiting plate (44). The guide rod B (43) is supported by the bracket B (16). The bracket B (16) has a hole B (46). The guide rod B (43) is slidably connected to the hole B (46). The guide rod B (43) has a cylindrical boss B (42). The cylindrical boss B (42) is opposite to the steel ball B (14). The tail end of the guide rod B (43) has a threaded rod C (17). The nut B (47) is connected to the threaded rod C. (17) A spiral connection is provided, wherein the spring B (48) is fitted on the guide rod B (43) and located between the cylindrical boss B (42) and the bracket B (16); the measuring device includes a bracket C (27), a bracket D (23), a rotating shaft (19), a swinging component (20), a cylindrical ring (55), a support block (29), a bolt E (31), and a nut C (28). Spring C (30), dial indicator (26), screw (24), bracket C (27) and bracket D (23) are fixedly connected to the workbench (2), the rotating shaft (19) is fixedly mounted on bracket C (27), the swinging part (20) is provided with a cylindrical ring (55), the swinging part (20) is rotatably connected to the rotating shaft (19) through the cylindrical ring (55), the swinging part (20) is provided with a through groove (54), bracket C (27) is fixedly connected to support block (29), bolt E (31) passes through the through groove (54) on the swinging part (20) and is fixedly connected to support block (29) through a screw connection with nut C (28), spring C (30) is fitted on bolt E (31) and located between support block (29) and swinging part (20), the dial indicator (26) rod (22) is on bracket D (23) by screw (24). Securely fastened, the dial indicator (26) is equipped with a probe (21), which is opposite to the oscillating component (20).

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